user
Send an email to an employer apologizing for not providing the promised service.

Additional Context:
Reason: Unexpected delay in delivery.

Answer:
assistant
Dear [Employer],

I apologize for not being able to provide the promised service in the expected timeline. Unfortunately, there was an unexpected delay in delivery that I was unable to predict. I understand that this may have caused you inconvenience, and I apologize for the same. I would like to assure you that I will make all efforts to meet the expected timelines in the future. 

Thank you for your patience,
[Your Name]